(3) Make sure that the access platform is in position.

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 Subtask 75-24-49-010-052

 B. Make sure that the fan cowl doors are open: (Ref. TASK 71-13-00-010-040) FOR 1000EM1 437AL, 438AR FOR 1000EM2 447AL, 448AR
 4. Procedure
_________
 (Ref. Fig. 401/TASK 75-24-49-991-300)
 Subtask 75-24-49-420-050
 A. Installation of the ECU air cooling tube.
 (1) Remove the protective covers from the ECU and the ECU cooling duct.

 (2) Install the clamps (5) on each end of the ECU air cooling tube (10).

 (3) Compress the ECU air cooling tube (10) and install it on the ECU and the ECU cooling duct.

 (4) Move the clamps (5) into position at each end of the ECU air cooling tube (10). Tighten the clamps.

 5. Close-up
________
 Subtask 75-24-49-410-050
 A. Close Access
 (1) Make sure that the work area is clean and clear of tool(s) and other items.

 (2) Close the fan cowl doors: (Ref. TASK 71-13-00-410-040)
 FOR 1000EM1
 437AL, 438AR
 FOR 1000EM2
 447AL, 448AR

 (3) Remove the access platform(s).

 (4) Remove the warning notice(s).

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 TUBES - ECU AIR COOLING - INSPECTION/CHECK
__________________________________________ TASK 75-24-49-210-042 Visual Inspection of the ECU Air Cooling Tubes and Ducts
 1. Reason for the Job

__________________
 Self Explanatory

 2. Job Set-up Information

______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific lint-free cloth No specific warning notice No specific access platform 0.5 m (1 ft. 8 in.)
 B. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
71-13-00-010-040 Opening of the Fan Cowl Doors 71-13-00-410-040 Closing of the Fan Cowl Doors 75-24-49-991-301 Fig. 601
 3. Job Set-up
__________ Subtask 75-24-49-941-051
 A. Safety Precautions
 (1) On the center pedestal, on the ENG panel 115VU:

 (a) Put a warning notice to tell persons not to start the engine.

 (2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.

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 (3) On the overhead maintenance panel 50VU:

 (a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.

 (b) Put a warning notice to tell persons not to energize the FADEC 1(2).

 Subtask 75-24-49-010-051
 B. Get Access
 (1) Open the fan cowl doors: (Ref. TASK 71-13-00-010-040)
 FOR 1000EM1
 437AL, 438AR
 FOR 1000EM2
 447AL, 448AR

 (2) Put an access platform in position.

 4. Procedure
_________ (Ref. Fig. 601/TASK 75-24-49-991-301) Subtask 75-24-49-210-050
 A. Visual inspection of the ECU air cooling tube
 (1) If required, clean dirty parts with a clean lint-free cloth.

 (2) Examine the ECU air cooling tube for cracks and holes. No holes or cracks are permitted. Replace damaged tubes.

 (3) Examine the tube clamps for corrosion, damage or missing clamps. Repair corrosion and replace damaged or missing clamps.

 (4) Examine the ECU cooling air duct for corrosion or damage. Repair corrosion or damage to the duct.

 (5) Examine the ECU cooling duct for corrosion or damage. Repair corrosion or damage to the duct.

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 ECU Air Cooling Tube
 Figure 601/TASK 75-24-49-991-301

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